Installation Manual

A-20
Cable Specifications
Synchronous Serial Cable Assemblies and Pinouts
Cable Specifications
ISDN BRI Port and Cable Pinouts
Table A-13 lists the ISDN BRI port pinouts. The straight-through RJ-45-to-RJ-45
cable, used to connect to the ISDN BRI port, is not included.
Table A-13. BRI Port (RJ-45) Pinout
RJ-45
8 Pin
a
a. Pins 1, 2, 7, and 8 are not used.
TE
b
b. TE refers to terminal terminating layer 1 aspects of TE1, TA, and NT2 functional
groups.
NT
c
c. NT refers to network terminating layer 1 aspects of NT1 and NT2 functional groups.
Polarity
3 Transmit Receive +
4 Receive Transmit +
5 Receive Transmit –
6 Transmit Receive –
J3138.bk Page 20 Wednesday, March 18, 1998 6:07 PM